Computational hydrodynamic simulations for an underwater axisymmetric hemisphere-cylinder hull-form at incidence

This contribution presents computational hydrodynamic simulation results for a generic hull shape with an attached short pin-protuberance. this work is a part of a large framework of numerical simulation and experimentation carried out for blunted head-forms of various hemispheric shapes,for determination of aero-hydrodynamic coefficients and their static stability features. presently results of static axial and circumferential pressure distribution on the surface are presented for a clean hull-form with the pin-protuberance,calculations are made for a selected velocity with varying angle of attacks,under a non-cavitating depth. it is shown that a suitably located short lateral pin has an adequate effectiveness to control pitch maneuver of an underwater hemispherecylinder hull-form. a suitable pin-height deployment commensurate to required pitch attitude trajectory correction is found to be a workable idea. simulation results show that the concept has potential of effective pitch attitude control of the hemisphere-cylinder hull-form. © 2014 aname publication. all rights reserved.